Catheter with advanced locking hub features

Abstract

Described are catheters having a distal catheter tube region that can be secured in an anchoring profile by a locking engagement of a filament at a catheter hub. The catheter hub can include a locking arm that cooperates with a hub body to provide a locked position that compresses and positionally fixes a portion of the filament between a fixing surface of the locking arm and a fixing surface of the hub body. The locking arm can define a cutting notch in its outer surface through which a further portion of the filament passes in the locked position, and the further portion of the filament can be cut to release the secured condition of the anchoring profile as the locked position of the hub is maintained. The locked position defined between the hub body and the locking arm can leave at least portions of the respective fixing surfaces of the locking arm and the hub body spaced from one another a distance, when in a relaxed or unstressed condition. The locking arm can include first, second and third holes for routing the filament between the inner and outer surfaces of the locking arm, which can provide a filament path extending through the cutting notch and between the fixing surfaces of the locking arm and hub body. The locking arm can define a cinching notch for cinching and thereby securing a proximal-most segment of the filament.